Reference Source

Air-Purifying Respirator · Half mask · 29 CFR 1910.134

For Air-Purifying Respirator, facepiece is Half mask; jurisdiction is 29 CFR 1910.134; assigned protection factor is 10; conditions is This APF category includes filtering facepieces, and half masks with elastomeric facepieces, recorded from its source on 2026-09-24.

Respirator type
Air-Purifying Respirator verified
Facepiece
Half mask our reading
Assigned protection factor
10 verified
Jurisdiction
29 CFR 1910.134 our reading
Conditions
This APF category includes filtering facepieces, and half masks with elastomeric facepieces. verified
Sourceecfr.gov
Verified
Review by
DatasetRespirator assigned protection factors — federal OSHA and Cal/OSHA, with maximum use concentrations

Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.

What the source says

Assigned protection factor

The source prints this value inside the passage below but does not name it there. The passage shows where it appears; what ties it to this record is the position on the page, not anything the passage says.

1. Air-Purifying Respirator | 5 | 3 10 | 50

— ecfr.gov, retrieved 2026-09-24

Where each value comes from

The value above is stated away from the sentence quoted with the answer, so the passage that states it is shown here too.

Conditions

This APF category includes filtering facepieces, and half masks with elastomeric facepieces.

— all from ecfr.gov, retrieved 2026-09-24

Source

Last verified against source: . Due for re-check by . This page as Markdown · OKF bundle · full dataset as JSON.